Natural abundance15n solid-state nmr study of nylon-6 in blends

Abstract

ABSTRACT: Natural abundance solid-state nuclear mag-netic resonance spectroscopy (NMR) of nitrogen-15 ( 15 N)was applied to investigate the films of nylon-6 and theirblends with poly(propylene oxide) (PPO). The NMR 15 Nresults allowed us to identify the crystalline forms present inthese blends and also confirmed the previous NMR resultsobtained by 13 C-NMR study. From all NMR data the anti-plasticization phenomena and plasticization effects causedby PPO content, in the blends were characterized. Thepolyoxide action is a function of its proportion. However,because the samples were prepared by solution casting, theresidual solvent action cannot be ignored. The 15 N chemicalshift changes were influenced by both PPO and residualsolvent. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90:3872–3875, 2003 Key words: natural abundance 15 N; solid-state NMR; ny-lon-6; films; blends INTRODUCTION Solid-state NMR provides a great deal more informa-tion on sample properties than does solution NMRbecause of the physical interaction; it also has discrim-inating pulse sequences that provide the componentspresent in different domains